use version 2 of friendsofphp/php-cs-fixer

add fromIntToRgb and fromRgbToInt methods

update package version

Merge pull request thephpleague#18 from thephpleague/0.2.0-dev

0.2.0

Merge pull request thephpleague#34 from thinksaydo/master

Switch to singleton method for Laravel 5.2

Merge pull request thephpleague#30 from GrahamForks/patch-1

We don't need to call the package method

prevent infinite loop if all next colors merge

improve performances

Merge pull request thephpleague#16 from leolabs/patch-1

fix case where we have less colors than requested

stop merging colors if there are as many as requested